| Sleaford to Arcos de Valdevez | 855.16 mi (1,376.24 km) |
| Sleaford to Arcozelo | 910.05 mi (1,464.59 km) |
| Sleaford to Arganil | 953.17 mi (1,533.98 km) |
| Sleaford to Arouca | 910.28 mi (1,464.95 km) |
| Sleaford to Arruda dos Vinhos | 1,051.74 mi (1,692.60 km) |
| Sleaford to Aveiro | 937.33 mi (1,508.48 km) |
| Sleaford to Aver-o-Mar | 890.43 mi (1,433.01 km) |
| Sleaford to Aves | 878.80 mi (1,414.29 km) |
| Sleaford to Azambuja | 1,042.65 mi (1,677.98 km) |
| Sleaford to Baiao | 891.30 mi (1,434.41 km) |
| Sleaford to Barcelos | 880.17 mi (1,416.50 km) |
| Sleaford to Barreiro | 1,072.29 mi (1,725.69 km) |
| Sleaford to Batalha | 1,003.59 mi (1,615.12 km) |
| Sleaford to Beja | 1,093.82 mi (1,760.33 km) |
| Sleaford to Belas | 1,069.03 mi (1,720.43 km) |
